Sound-producing diaphragm.



S. D. PADDACK' SOUND PRODUCING DIAPHRAGM. APPLICATION FILBDYJUNB 16, 1913.

Patented July 7, 19M

INVENTOR Pa ddwaza.

A Homejus erron- Simon ran-neon, or new roan, 1s. v

SGUND-FRUDUGENG DIAPHEAGll-fi.

meager.

Specification of Letters Patent.

Tfa'tented may '2, 1914,

Application filed June 16, 1913. Serial No. 7754,4352.

To all whom it may concern .1

Be 1t known that I, SIMOND. Paopaon, a

citizen'of the .United States, residing ig the city of New York, borough of li'ianhattan, county and State of New York, have invented a certain new and useful Sound- Producing Diaphragm, of which the following is a specification.

This invention pertains to sound producing diaphragms, particularly adapted for use in phonographs, and embodies-the diawaxy material. The object of the invention is the producphragm as a new article of manufacture.

tion of a diaphragm which emits clear, pure, and resonant tones, in contradistinction to the diaphragms now in use which produce tones of a more or less raspy or metallic character.

With the foregoing object in view, the in vention embodies a suitable base member, preferably blotting, paper, which has been rendered hard an given vibratory qualities by means of a certain chemical treatment.

The following detailed description of the manner of making the diaphragm is what I now consider the best method, but it will be understood that this is not the exclusive one, for, in all probability, other agents, more or less equivalent to those specified, may be employed to secure SOD'IQ'OI" all of the advantages of my invention.

1 preferably start with a piece of blotting paper of the desired size, and dip it ina suitable volatile agent or i'nenstruum, pref erably ordinary ether, although I may use, though not with the same advantage, aleo- 110i and benzol. The blotting paper having been treated as described, I immerse it, while saturated with the solvent, in a molten mixture consisting, preferably, of Japan wax, resin, and fish glue. The proportions of the ingredients entering into this mixture may be varied within considerable limits, but the proportions, by weight, which I have found to give the best results, are substantially as foll0ws:-Japan wax 20%, resin fish glue 20%. The ingredients are mixed together and simply heated, preferably ov'er a water bath, to a sufiicient degree to melt them and produce a homogeneous mixture. The blotting paper, or other base material for .the diaphragm, having been immersed in the mixture, is withdrawn and allowed to cool, whereupon there results a hard, water-proof, sonorous disk, particularly adapted to 1 the purposes specified.

In the accompanying drawing is illustrated a sound-producin bodying my invention, W ierein-- Figure 1 is a face View of the diaphragm embodying my invention, and Fig. 2 is a cross section through the center-thereof.

Referring to the drawings, A designates the base member, preferably embodying blotting paper, and B the compositionot' l have found I can substitute for the Japan wax in the foregoing mixture, beeswax, carnauba wax, or parafiin wax, and, doubtless, some of the numerous other waxes on the market may be used. I prefer, however, to use the Japan wax. For the fish glue specified, I may substitute gelatin, collogen, or equivalent material. The gelatin may be dispensed with, in whole or in part, and yet some of the advantages of my invention be retained in the mixture of Wax and resin. I prefer, however, to use the gelatin, or its equivalent, in the manner specified.

The function of the ether, or other volatile agent, appears to be that of opening up, or loosening the pores or fibers of the base ma terial, thereby rendering it more susceptible to the subsequent treatment. In other words, by opening the pores of the base niateriai, the waxy mixture more readily ad-' heres thereto, or is. more easily taken up thereby. in some cases I have used softeningagents, less volatile than those mentioned, though not with as goodresults.

When blotting paper is employed as'the base of the diaphragm, treated in the manner described, it will be manifest that said blotting paper so absorbs the waxy mixture as to become saturated and coated therewith, although it will be understood that other base materials, less absorbent-than blotting paper, ma be employed. I have found, however, t at blotting paper gives very superior results.

Having thus fully described the invention, what I claim as new, and desire to secure by Letters Patent, is

1. As a new article of manufacture, a

sound producing diaphragm consisting of a.

suitable base having'waxy material and a hardening e ent for the waxy material in-' corp orated there n.

diaphragm en 2. As a new article of manufacture, a sound producing diaphragm. consisting of asuitable non-metal1ic base havin waxy material and a hardening agent for the waxy material incorporated therein.

3. As a new article of manufacture, a sound producing diaphragm consisting of blotting paper having waxy material and a hardening agent for the waxy material incorporated therein;

4. As a new article of manufacture, a sound producing diaphragm consisting of a suitable base to which has been applied a composition containing wax and resin.

5. As. a new article of manufacture, a sound producing diaphragm consisting of a suita 1e base to which has been applied a composition containing wax, resin and glue.

6. {is a new article of manufacture, a

sound producing diaphragm consisting ol sound producing diaphragm consisting of a base of absorbent nature and having its pores filled with a waxy material containing a hardening agent which reuc'lers it hard and sonorous.

In testimony whereof l have signed my name to this specification in the presence of two subscribing witnesses.

SlliiUr-i D. PADDACK. Witnesses M. C. Ronmcmiz, F. S. Fi'rzsnaonsj 

